docs: def node_field_stats(self, nodes=None):
          """
          Retrieve field stats per node(s) or cluster wide
          :ref:`nodes info <es-guide-reference-api-admin-cluster-nodes-stats>` API allows to retrieve one or more (or all) 
          the cluster nodes info about field data memory usage
          """
          parts = ['_nodes', 'stats', 'indices']
          if nodes:
              paths = ['_nodes', ",".join(nodes), 'stats', 'indices']
  
          path = make_path(*parts)
          return self.conn._send_request('GET', path)